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03-07-2011, 07:43 PM | #1 |
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Location: Pinehurst, Idaho
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Belt squeak that I can't figure out
I'll start out by saying that I have a brand new alternator and its a brand new belt. Ok when I turn my heater on the belt starts squeaking uncontrollably and when I turn it off its fine. So if I tighten it up at all it starts making a hissing sound like its too tight. The belt runs around the alt, water pump, and crank pulley. It looks like its in line with the water pump pulley but I can tell that the alignment is off a little bit with the crank pulley. So can I get a shorter belt and run it just around the alt and water pump? Because the power steering belt still goes around all three. I really need some ideas because I have never heard an engine that makes this much noise and I just can't seem to figure it out.
Any and all suggestions will be tried. Thanks |
03-07-2011, 07:59 PM | #2 |
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Location: vernon b.c.
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Re: Belt squeak that I can't figure out
I have the same problem,mine sounds like crickets.My does it at certain temp.there was a thread on this and it seems to be the belt stlye on the pully.
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03-07-2011, 08:40 PM | #3 |
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Location: Pinehurst, Idaho
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Re: Belt squeak that I can't figure out
That is a better way to describe it, thats exactly what mine sounds like. So its the style of belt? I thought v belts were v belts
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03-07-2011, 08:49 PM | #4 |
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Location: windsor
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Re: Belt squeak that I can't figure out
Try toothpaste, I hear that because it is abrasive it will take any hard spots off. May be an old wives tale or it might work, either way you can wash it off if it doesnt help.
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03-07-2011, 09:43 PM | #5 |
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Location: washington the state
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Re: Belt squeak that I can't figure out
sand the pulleys but dont go with the grove sand up and down into the grove
but first check and see if its running true if you cant see by looking down the belt put a strait edge to the face of the pulleys
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03-07-2011, 09:45 PM | #6 |
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Location: cleburne texas
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Re: Belt squeak that I can't figure out
width of belt is incorrect
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03-07-2011, 09:51 PM | #7 |
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Re: Belt squeak that I can't figure out
If it is doing this when the heater is on wouldn't it be the ac/ps belt not the alt. belt or did I miss something
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<Brandon> 1974 Chevrolet K5 Blazer 350sbc/SM465/NP205, dana44 front, corp 14bolt rear with 4.10s and a powertrax locker, custom rear bumper 400sbc in the works. 1981 GMC C1500 stepside 250i6, 3spd, 12bolt with 3.08s 2.5/4drop on 15x10 with 275/50r15 81 GMC C3500 cab-chassis dually with utility bed 350sbc, Sm465, 14bolt with 4.10s nv4500 getting ready to go in 1979 Chevrolet K5 R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434096 1976 Chevrolet C10 R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434195 Last edited by bmchevy1979; 03-07-2011 at 09:51 PM. |
03-08-2011, 07:38 AM | #8 |
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Re: Belt squeak that I can't figure out
I some times use a broom stick held on parts running(or close to it)
place the other end in your ear(don't worry it dosn't need to fit,just rest outside there) the sound will go up the stick
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03-08-2011, 03:06 PM | #9 |
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Re: Belt squeak that I can't figure out
Thanks for the responses guys. I know it is the alt belt because when I take it off its nice and quiet, I assume it does this with the heater on becuase there is more load on the alt, It will also do it with the lights on.
Pig rig, If I look at the belt from the alt down to the crank pulley I can see that its off, But it is inline with the water pump, thats why I was curious about getting a shorter belt and just running it around the alt and water pump. Would this work? Also the belt with could be an issue I guess the pulley that was on the new alternator that I got was a little skinny. I'll post up some pics. |
03-08-2011, 03:28 PM | #10 |
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Re: Belt squeak that I can't figure out
right there with ya csb. mine is a minor squeak (that doesn't last) when i turn the heat on. i also have another belt that seems to squeak when i start the truck. maybe the same belt for all i know?
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03-08-2011, 05:39 PM | #11 |
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Re: Belt squeak that I can't figure out
Well I figured out a fix, Instead of having the belt go around the alternator, water pump and crankshaft I just got a shorter one and went around the Alternator and water pump only, and guess what no more noise. It seems to work fine, I didn't see a problem in doing this so I did it. Hopefully it works out fine.
Thanks for the suggestions though everyone |
03-16-2011, 01:36 PM | #12 |
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Re: Belt squeak that I can't figure out
Just jam and aircraft screw driver in between the alt and the guard then lock it down tight. tight belts don't squeal unless a pulley seizes
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03-16-2011, 03:17 PM | #13 | |
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Re: Belt squeak that I can't figure out
Quote:
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03-16-2011, 03:30 PM | #14 |
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Location: Pinehurst, Idaho
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Re: Belt squeak that I can't figure out
This seemed to fix the problem except that schucks gave me the wrong size, I asked for a 30" belt and the7 gave me a 31 5/8" so when it stretched it is now too long. haha
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03-19-2020, 08:25 PM | #15 | |
But Found Her 25yrs Later!
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Re: Belt squeak that I can't figure out
Quote:
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I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035 |
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03-20-2020, 02:31 PM | #16 |
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Re: Belt squeak that I can't figure out
In work in the hvac field. Regular V belts are equivalent to our A series belts.
We have a AX series which works really well for reducing squeaking since it can bend around tighter pulleys quite easily. I have used them on my trucks since I have a stock of them. May work better under the conditions you experience. |
04-10-2020, 02:13 PM | #17 |
But Found Her 25yrs Later!
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Re: Belt squeak that I can't figure out
I put on a different alternator pulley and no more squeal.
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I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035 |
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